#define _CRT_SECURE_NO_WARNINGS
#include<iostream>
#include<string>

using namespace std;
const int N = 1e6 + 10;
int a[N], b[N], c[N];
int la, lb, lc;
void mul()
{
	for (int i = 0; i < la; i++)
	{
		for (int j = 0; j < lb; j++)
		{
			c[i + j] += a[i] * b[j];
		}
	}
	for (int i = 0; i < lc; i++)
	{
		c[i + 1] += c[i] / 10;
		c[i] %= 10;
	}

	while (c[lc -1] == 0 &&lc > 1) lc--;

}
int main()
{
	string x, y; cin >> x >> y;
	la = x.size(), lb = y.size(), lc = la + lb;
	for (int i = 0; i < la; i++) a[la - i - 1] = x[i] - '0';
	for (int i = 0; i < lb; i++) b[lb - i - 1] = y[i] - '0';

	mul();

	for (int i = lc - 1; i >= 0; i--) cout << c[i];
}

